<template>
  <div>
    <div class="search">
      <input
        type="text"
        placeholder="输入城市名或拼音"
        class="search-input"
        v-model="keyword"
      >
    </div>
    <div class="search-content" ref="search" v-show="keyword">
      <ul>
        <li
          class="search-item border-bottom"
          v-for="item of list"
          :key="item.id"
          @click="handleCityClick(item.name)"
        >
          {{item.name}}
        </li>
        <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
      </ul>
    </div>
  </div>
</template>

<script>
  import {mapActions} from 'vuex'
  import Bscroll from 'better-scroll'
  export default {
    name: "CitySearch",
    props: {
      cities: {
        type: Object
      }
    },
    data () {
      return {
        keyword: '',
        list: [],
        timer: null
      }
    },
    computed: {
      hasNoData () {
        return !this.list.length
      }
    },
    mounted () {
      this.scroll = new Bscroll(this.$refs.search);
    },
    methods: {
      ...mapActions({
        setCity:'changeCity'
      }),
      handleCityClick (city) {
        this.setCity(city);
        this.$router.push('/');
      }
    },
    watch: {
      keyword () {
        if (this.timer) {
          clearTimeout(this.timer)
        }
        if (!this.keyword) {
          this.list = [];
          return;
        }
        this.timer = setTimeout( () => {
          const result = [];
          // 如果搜索的时候，输入的关键字和获取到的城市的拼音或者文字的进行匹配，能匹配就push到 result的数组中进行展示
         for (let i in this.cities) {
            this.cities[i].forEach((value) => {
              if (value.spell.indexOf(this.keyword) > -1 ||
              value.name.indexOf(this.keyword )> -1
              ) {
                result.push(value)
              }
            })
          }
          this.list = result;
        },100)
      }
    }
  }
</script>

<style scoped lang="stylus">
  @import '~styles/varibles.styl'
  .search
    height .72rem
    background $bgColor
    padding 0 .1rem
    .search-input
      box-sizing border-box
      height .62rem
      line-height .62rem
      width 100%
      text-align center
      border-radius .06rem
      color #666
      padding 0 .1rem
  .search-content
    overflow hidden
    position absolute
    top 1.58rem
    left 0
    right 0
    bottom 0
    z-index 1
    background-color #eee
    .search-item
      line-height .62rem
      padding-left .2rem
      color #666
      background #fff
</style>
